Question: 1980 CB750F has carbs from a 900 - yes or no?

Posted by spartan8ball on Sep 01, 2008; 11:17pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Question-1980-CB750F-has-carbs-from-a-900-yes-or-no-tp458280.html

The bike runs pretty well as is.  Something definitely needs adjusted, because the bike will stall when the clutch is pulled and the engine returns to idle speed.  It also lacks the "ball-kicking" power that everyone tells me it is supposed to have.

so here's my question.  My bike has had the carbs replaced with carbs from a 900.  I also have the original 750 carbs as well for spares.  the bike will not even start with the original carbs (they need rebuilt) but it runs good with the 900 ones on.  I noticed the fuel rail is bigger on the 900 carbs, other than that, seems to be the same size (although I am sure the needles, etc are different sizes.)

So... Should I rebuild the original carbs?  Or take it to a bike shop as is and let them adjust the 900 carbs? (synch, adjust idle speed)  Will running it with 900 carbs foul/burn the plugs/pistons/rings becuase of too much fuel?

and if rebuilding the original carbs is the best option, where is a good place to get the rebuild set for all four for cheap?